CalMag usage question

[Grapefruitroop]

Yeah man IME, Leds plus coco means you cant never overfeed magnesium and calcium.....
You can get10lb bags for very cheap on amazon of Calcium Nitrate and Magnesium Sulphate.

I use Masterblend as base formula

 

[stiff]

You don't need calmag. Just increase the base fertilizer you're already using. It has the same effect.
Also looks like you know what you're doing.

You DO need calmag if you grow in coco! Specially under LED lights.

You might have missed the part where he said he's on coco...or you're just wrong.
I grow outdoors in coco and give it less of it compared to whats in my tents,but you definitely need to provide some sort of calcium and magnesium.

How much you add is up to your lights and your tab water. The guideline on the bottle is a rough estimate and usually on the higher side,as the company wants to sell their products.

I have to agree with @Grow44DE
Your plants look fine, I'd also be continuing this way.
Besides that..Here's a little guide which helped me a lot when i was nrw to it, but be aware that I use 400w LED and also a 650w. You need less if your light isn't as powerful!

A seedling wants about 50mg of calcium per liter of water you give it.

A plant in veg about 40cm tall probably about 100mg/L

A plant in full flower probably around 150mg/L ..even more if it's a hungry plant.

Now also don't forget that your water might already have calcium and magnesium in it, you teally have to get it tested if you want to use the calmag precisely...or read the water analysis results usually on the homepage of your provider availablefor free,that's if its tab water.

As an example if your tab water has 80mg of calcium and 20mg magnesium and you goal is to give it 150mg cal and 50mg magnesium..then all you have to do is add that much that it gets you to those numbers.
It's just a calculation!
(Calcium to magnesium ratio should always be 3:1)
I hope it helps anyone new to coco and calmag